Apparently I didn't survive for over two minutes! What I'd work on more are the controls (it's been a while since I played Balloon Fight, but I think the left-right movement isn't as fast/responsive) - controlling the game almost felt too easy.
Even with that, the collision felt unfair sometimes. It felt like a lot of the times that I lost were not my fault, and that I didn't *actually* quite collide with the diamond shapes. If the diamonds use box colliders, that might explain why.